This meta viewport tag will sets the screen
width to the pixel width of the devices and references to jQuery.

In header section I added some of script & css
files we need to add those files if we want to implement jQuery
mobile site.

In body section, we defined a div with a data-role property
by using that property we can mention a page (data-role="page"),
header (data-role="header")
and content region (data-role="content") to create a basic
page. These data- attributes are HTML5 attributes are used throughout jQuery
Mobile to transform basic markup into an enhanced and styled widget.